1999

6.8

1996

6.5

2000

7.8

2019

4.0

2008

6.0

2014

4.4

1994

0.0

2000

0.0

2011

5.1

2010

5.3

1984

6.9

1974

2.0

1994

1.0

1973

8.7

2017

6.6

2003

7.5

2004

6.2

2007

6.0

2012

5.5

2013

6.0

2008

7.4

1993

0.0

1997

6.0

2005

7.6

2015

5.4

1970

6.2

2019

0.0

1999

5.5

2003

6.0

2009

6.1

1975

0.0

1995

4.6